feat(规则): 支持名称代号，便于区分和管理

创建与更新规则时必填全局唯一 name，已有规则迁移回填为 rule-{id}。

internal/handler/rule.go

@@ -22,6 +22,7 @@ func NewRuleHandler(s *store.Store, c *cache.Cache) *RuleHandler {
 }
 
 type createRuleReq struct {
+	Name         string            `json:"name"          binding:"required"`
 	SourceName   string            `json:"source_name"   binding:"required"`
 	Event        string            `json:"event"         binding:"required"`
 	TemplateName string            `json:"template_name" binding:"required"`
@@ -65,6 +66,7 @@ func (h *RuleHandler) Create(c *gin.Context) {
 	}
 
 	rule := &model.Rule{
+		Name:       req.Name,
 		SourceID:   src.ID,
 		Event:      req.Event,
 		TemplateID: tmpl.ID,
@@ -138,6 +140,7 @@ func (h *RuleHandler) Update(c *gin.Context) {
 	}
 
 	rule := &model.Rule{
+		Name:       req.Name,
 		SourceID:   src.ID,
 		Event:      req.Event,
 		TemplateID: tmpl.ID,